Modifed randNLike for scripting (#32830)
Summary:
the rand N like function had required args which were not being used.
As such modified the method signature to give default values so when
scripting does not provide these arguments which are not even being
used, no error is thrown.
Additionally modified the const checker for handling prim::Constant as
well
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32830
Reviewed By: hl475
Differential Revision: D19731715
Pulled By: houseroad
fbshipit-source-id: a3cacb3977eecb88b122e0ceb654fdbf1c8286c1
